What may happen, though, is that the proponent may ignore you pointing out the false argument and keep repeating how true the fact is. Online discussion often includes a lot of this kind of repetition, plus noise to keep people from focusing on the core structure of the argument.
I made https://en.howtruthful.com/ to facilitate presenting the core structure of an argument concisely, with the true parts and false parts appropriately marked.
I agree that the way to combat that is a way to track and interact with the structure of the argument. I like that you have that project, I've had other ideas along those lines on how to represent arguments and get people to engage with them. Hope your project is going well.
I made https://en.howtruthful.com/ to facilitate presenting the core structure of an argument concisely, with the true parts and false parts appropriately marked.